Do people really still think it goes to 0?
You don't have to think it will go to 0 to panic sell.
It's much simpler than this!
People who buy to get quick gains think only about their profit and they don't have a plan for the next 2 years without their money. They cannot wait.
They either get some profit right now or they'll even take the loss just to free their capital and be able to invest in something else. Most traders think they can make more money if only they are not left holding a bag. Some are right, most are wrong.